Graded A+
double blind experiment person implementing the experiment and the participant(s) are
not aware of which individual is receiving the experimental treatment
placebo a substance that has no effect, typically used as a control in a study
case control (retrospective) study uses already collected data for a different purpose
cross sectional study examines data at a specific point in time
Cohort (Prospective) Study watches for outcomes over time (longitudinal)
digestive tract The mouth breaks up food, which then travels down the esophagus to the
stomach, which churns the food and secretes acid and enzymes. The chyme then enters the small
intestine where the majority of nutrient absorption occurs. In the large intestine, water and
electrolytes are removed
,mechanical digestion muscle driven mixing of food and contractions that push material
through the GI tract. It occurs all along the digestive tract through chewing, mixing, peristalsis,
and mass movements
chemical digestion occurs throughout the entire GI tract through secretions of different
enzymes.
digestion of carbs, protein, fat, water Proteins are digested in the stomach and absorbed in
the small intestine. Fats and carbohydrates are digested and absorbed in the small intestine.
Water is absorbed in the small and large intestines.
secretions of the digestive system saliva, mucus, enzymes, HCl, bile, bicarbonate,
hormones
saliva secreted by the salivary glands in the mouth. Lubricates food and breaks starches
into sugars.
mucus secreted in the mouth, stomach, and intestines and lubricates the GI tract
, enzymes secreted by the mouth, stomach, small intestine, and pancreas and break down
macronutrients
HCl secreted by the stomach and unwinds protein chains, stops carbohydrate digestion,
and kills microorganisms
bile secreted by the liver and breaks down fats
bicarbonate secreted by the pancreas and small intestine and neutralizes stomach acid
3 requirements of healthy cardio and lymph systems oxygen, energy, nutrients
regulation of hunger by the brain digestive tract sends messages to the hypothalamus by
way of hormones and nerves. The brain's cortex perceives these hunger pains.
where are carbs stored liver and mucles
where is fat stored adipose tissue